Papers - HANJI Takeshi

Low cycle fatigue testing system by means of image analysis technique

Takeshi Hanji, Kazuo Tateishi

Proceedings of the 7th Korea-Japan Joint Seminar on Steel Bridges     page： 441-449   2003.8

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Authorship：Lead author   Language：English   Publishing type：Research paper (scientific journal)  

Almost all the low cycle fatigue cracks observed in Hanshin-Awaji Earthquake were initiated from welded joints. In this study, a new testing system was developed, which enables the investigation on the low cycle fatigue strength of welded joints. In this testing system, a specimen was subjected to bending deformation, and the strain in the specimen was measured by means of image analysis technique. It was shown that the strains measured by the image analysis were almost equal to those measured by strain gauges, and the low cycle fatigue strength of plain steel material obtained by this testing system was in good agreement with the results reported in former studies.

Method for estimating fatigue crack propagation rate for a crack in welded joints Reviewed

Kazuo Tateishi, Takeshi Hanji, Satoshi Yamada, Makoto Abe

Steel Construction Engineering, JSSC   Vol. 8 ( 31 ) page： 11-16   2001.9

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Authorship：Lead author   Language：Japanese   Publishing type：Research paper (scientific journal)  

Recently, a lot of fatigue cracks have been found in steel bridges to the increase of the large-scale vehicles in number as well as weight. In order to consider a repairing this study, a method to estimate the fatigue crack propagation rate is proposed, which is based on the crack opening width measured by image analysis on a digital image recorded with a portable digital microscope. The accuracy and limitation of the method were investigated through a fatigue test carried out on a fatigue crack in welded joint specimen.

DOI： 10.11273/jssc1994.8.31_11

Estimation method for crack propagation behavior in welded joint

Kazuo Tateishi, Takeshi Hanji, Makoto Abe

Proceedings of the 6th Korea-Japan Joint Seminar on Steel Bridges     page： 369-373   2001.8

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Language：English   Publishing type：Research paper (scientific journal)  

Monitoring system for fatigue crack propagation by image analysis

Kazuo Tateishi, Takeshi Hanji, Makoto Abe

Current and Future Trends in Bridge Design, Construction and Maintenance   Vol. 2   page： 256-260   2001

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Language：English   Publishing type：Research paper (scientific journal)  

溶接継手部に生じた疲労き裂の応力拡大係数の推定手法 Reviewed

舘石和雄，判治剛，山田聡，阿部允

鋼構造年次論文報告集   Vol. 8   page： 617-620   2000.11

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Language：Japanese   Publishing type：Research paper (scientific journal)